20402122896 has 45 divisors (see below), whose sum is σ = 57102405139. Its totient is φ = 6800136288.

The previous prime is 20402122877. The next prime is 20402122901. The reversal of 20402122896 is 69822120402.

The square root of 20402122896 is 142836.

It is a perfect power (a square), and thus also a powerful number.

20402122896 is a `hidden beast` number, since 20 + 402 + 1 + 228 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402122896.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1708081 + ... + 1719983.

Almost surely, 2^20402122896 is an apocalyptic number.

20402122896 is the 142836-th square number.

It is an amenable number.

20402122896 is an abundant number, since it is smaller than the sum of its proper divisors (36700282243).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402122896 is an frugal number, since it uses more digits than its factorization.

20402122896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820 (or 11908 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

Multiplying 20402122896 by its sum of digits (36), we get a square (734476424256 = 857016²).

20402122896 divided by its sum of digits (36) gives a square (566725636 = 23806²).

The spelling of 20402122896 in words is "twenty billion, four hundred two million, one hundred twenty-two thousand, eight hundred ninety-six".